Question

please answer this question. If A={1,b,b,{4,2},{x, y, z},d,{d}} ,then n(A)=?.

Answer 1

Answer:

Step-by-step explanation:

n(A) =6

Reason consider

1 as one element,

b, b as one element,

{4, 2} as one element,

{x, y, z} as one element,

d as one element,

{d} as one element

Answer 2

The cardinality of the set A = {1,b,b,{4,2},{x, y, z},d,{d}} is 7.

Given,

The set A={1,b,b,{4,2},{x, y, z},d,{d}}.

To Find,

The cardinality of the set A.

Solution,

The method of finding the cardinality of the set A={1,b,b,{4,2},{x, y, z},d,{d}} is as follows -

The number of distinct elements of a set is called the cardinality of the set.

For a finite set, the cardinality of the set is finite.

For an infinite set, the cardinality of the set is infinite.

In this given set A={1,b,b,{4,2},{x, y, z},d,{d}}, we can see there are single elements and there are also some sets like {4, 2}, {x, y, z}, {d} which are also considered as a single elements of the set.

These sets may have multiple elements in them, but in the whole set A, these sets will be considered as single elements.

Now if we count the number of elements in set A, we can state that the cardinality of set A n(A) is 7.

Hence, the cardinality of the set A is n(A)=7.

#SPJ3